From 66adf7a6b928583a7dbd43db975b4cbd8aa436a5 Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Mon, 16 Mar 2020 05:02:41 +0100
Subject: [PATCH] cgen: minor sum type fix

---
 vlib/v/gen/cgen.v      | 2 +-
 vlib/v/gen/tests/3.c   | 6 ++++--
 vlib/v/gen/tests/3.vv  | 1 +
 vlib/v/parser/parser.v | 2 +-
 4 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/vlib/v/gen/cgen.v b/vlib/v/gen/cgen.v
index 02382cafd8..85ec29d593 100644
--- a/vlib/v/gen/cgen.v
+++ b/vlib/v/gen/cgen.v
@@ -1014,7 +1014,7 @@ fn (g mut Gen) match_expr(node ast.MatchExpr) {
 			match fe {
 				ast.Type {
 					it_type := g.typ(it.typ)
-					g.writeln('$it_type* it = ($it_type*)tmp3.obj; // ST it')
+					g.writeln('$it_type* it = ($it_type*)${tmp}.obj; // ST it')
 				}
 				else {
 					verror('match sum type')
diff --git a/vlib/v/gen/tests/3.c b/vlib/v/gen/tests/3.c
index 7f40895b2d..1b32538654 100644
--- a/vlib/v/gen/tests/3.c
+++ b/vlib/v/gen/tests/3.c
@@ -41,11 +41,11 @@ void println(string s) {
 void handle_expr(Expr e) {
 	Expr tmp1 = e;
 	if (tmp1.typ == _type_idx_IfExpr) {
-		IfExpr* it = (IfExpr*)tmp3.obj; // ST it
+		IfExpr* it = (IfExpr*)tmp1.obj; // ST it
 		println(tos3("if"));
 	}
 	else if (tmp1.typ == _type_idx_IntegerLiteral) {
-		IntegerLiteral* it = (IntegerLiteral*)tmp3.obj; // ST it
+		IntegerLiteral* it = (IntegerLiteral*)tmp1.obj; // ST it
 		println(tos3("integer"));
 	}
 	else {
@@ -62,5 +62,7 @@ int main() {
 	user.name = tos3("bob");
 	Option_int n = get_opt();
 	int a = /*opt*/(*(int*)n.data) + 3;
+	handle_expr((IfExpr){
+0});
 	return 0;
 }
diff --git a/vlib/v/gen/tests/3.vv b/vlib/v/gen/tests/3.vv
index c7fec00098..63092d63a6 100644
--- a/vlib/v/gen/tests/3.vv
+++ b/vlib/v/gen/tests/3.vv
@@ -46,4 +46,5 @@ fn main() {
 		return
 	}
 	a := n + 3
+	handle_expr(IfExpr{})
 }
diff --git a/vlib/v/parser/parser.v b/vlib/v/parser/parser.v
index 7c10febc96..0a1c5b46a9 100644
--- a/vlib/v/parser/parser.v
+++ b/vlib/v/parser/parser.v
@@ -1620,7 +1620,7 @@ fn (p mut Parser) match_expr() ast.MatchExpr {
 			}
 			p.scope.register_var(ast.Var{
 				name: 'it'
-				typ: typ
+				typ: table.type_to_ptr(typ)
 			})
 			// TODO
 			if p.tok.kind == .comma {